Field Marshall Julian Hedworth George Byng, 1st Viscount Byng of Vimy, Commander of the Canadian Corps from 1915 to 1917 and Governor General of Canada from 1921 to 1926 (born 11 September 1862 in Hertfordshire, United Kingdom; died 6 June 1935 in Essex, United Kingdom). Byng led the Canadian Corps to victory at the Battle of Vimy Ridge during the First World War. As governor general, he is best known for his role in the King-Byng Affair, when he formally refused Prime Minister William Lyon Mackenzie King’s advice to dissolve Parliament and call a federal election.

Thomas Dixon Byron Evans, soldier (b at Hamilton, Ont 22 Mar 1860; d at Battle Creek, Mich 23 Aug 1908). The outstanding Canadian soldier of his generation, he joined the 43rd (Ottawa and Carleton) Rifles in 1880, and was

Hugh Cairns, VC, plumber, soldier (born 4 December 1896 in Ashington, Northumberland, England; died 2 November 1918 in Valenciennes, France). During the First World War, Sergeant Cairns was the last Canadian soldier to be awarded the Victoria Cross (VC), the highest award for bravery among troops of the British Empire.

Clarence Sutherland Campbell, MBE, sport administrator, lawyer, Second World War veteran (born 7 September 1905 in Fleming, SK; died 23 June 1984 in Montréal, QC). As president of the National Hockey League from 1946 to 1977, Campbell's tenure was longer than any executive in any other sport.

James Campbell Clouston, naval officer (born 31 August 1900 in Montréal, Québec; died 2 or 3 June 1940 at sea, in the English Channel near Gravelines, France). Born and raised in Montréal, Campbell Clouston joined the British Royal Navy in 1918 and served on ships in the Mediterranean and the Atlantic. During the Second World War, Clouston acted as pier master during the Allied evacuation at Dunkirk, overseeing the evacuation of nearly 200,000 servicemen between 27 May and 2 June 1940. He died at sea after his boat was sunk by German aircraft. In September 2017, a commemorative plaque was dedicated to him in Montréal.

Prisoners of War (POWs) are members of the military captured in wartime by the enemy. Since the late 19th century, international rules have governed the treatment of POWs, although these are not always followed. Thousands of Canadians have endured time as POWs in conflicts ranging from the First World War to the Korean War.

Since 1990, peacekeepers from the Canadian Armed Forces (CAF) and civilian police forces, including the Royal Canadian Mounted Police (RCMP), have served in Haiti on various United Nations (UN) missions. The purpose of these missions was to help stop the internal violence and civil unrest that had plagued the country for years and help promote and protect human rights and strengthen police and judicial systems.

From 1993 to 1995, Canada was a leading contributor to a series of United Nations peacekeeping missions in the African nation of Rwanda. However, the United Nations Assistance Mission for Rwanda (UNAMIR), led by Canadian Major-General Roméo Dallaire, was powerless to prevent the slaughter of 800,000 Rwandans in 1994. Following the genocide, a new contingent of Canadian troops returned to Rwanda as part of UNAMIR II, tasked with restoring order and bringing aid to the devastated population. Hundreds of Canadian soldiers, including Dallaire, returned from their service in Rwanda deeply scarred by what they had witnessed.

In 1992–93, Canada contributed military forces to UNITAF, a United Nations–backed humanitarian mission in the African nation of Somalia. The mission was hampered by the fact that some of the warring factions in the Somalia conflict attacked the international forces that were trying to restore order and deliver food to a starving population. The Canadian effort was also clouded by the murder of a Somali teenager by Canadian troops. The crime — and alleged cover-up by Defence officials in Ottawa — became one of the most infamous scandals in Canadian history.